On a summer day in Shoreham, New York, the Kevin Williams Memorial Field is a peaceful place. An American flag ripples as its steel chain clanks against the 40-foot pole. At the base of the pole, worn baseballs seem to grow from the earth, resting among the flowers. On one baseball, there's a handwritten message: "We Will Never Forget." Kevin Williams was 24 years old when he was killed on Sept. 11, 2001. He worked on the 104th floor of the World Trade Center's south tower as a bond salesman for investment firm Sandler O'Neill. He loved his job and...